Select Edit Web Part from the PeopleZen Web Part menu and in the settings
tool-pane, you will find the Display Style section right at the top:

Display Style

PeopleZen provides two basic view styles, Tiles View and List View:

Tiles View — a Rolodex-like view where user profiles are arranged as
individual badges from
left to right.

For a clear tabular layout of tiles, specify the number of user profiles per row
in the In rows of text box. To have as many user profiles as possible per
row, with each row filling the entire Web Part zone and expanding to the maximum
available width before wrapping forces further profiles to be shown in a new row,
enter 0.

You can (and should) specify a width that is used per tile. Specifying too small
a value may wrap user profile field values that are too long in multiple lines.
When specifying a width, you can use any CSS-compatible unit value, for example 100px,
5cm or 20%.

List View — resembles the default layout and visual design of most out-of-box,
standard SharePoint Lists, with column headers and group headers sharing the same
CSS style rules also applied to built-in List View Web Parts. Each user profile
is represented as a single data record row.

Further Appearance and Design Customizations

You can customize the following visual artifacts through the
Miscellaneous section: the height of user profile pictures being used, the loading
animation shown during AJAX data refreshes, whether and how names and pictures are
displayed and/or linked, and whether an OCS/IM online presence indicator should
be displayed next to user names.

Some aspects of PeopleZen's graphical end-user interface (GUI) are affected by farm-wide or Site Collection-specific configuration settings,
such as:

Window target: to have user profile links target a new (popup) window or a frame or IFRAME on your page.

Control how email addresses are displayed and/or linked by providing a customized HTML template — by default,
List View just shows an envelope graphical icon while Tiles View shows the full email address.

Control how other user profile fields are displayed when they have and don't have a value set by providing a customized
HTML template (this can also simplify CSS-based theming)

If you'd like to combine multi-valued fields (collections of values such as
Skills, Responsibilities, Past Projects etc.) with a delimiter other than
the default comma, you can specify it.

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